ergophobe - 7:52 pm on Feb 28, 2011 (gmt 0)
Agreed. I tend to build off the Fusion Theme which depends on the Skinr module which is not yet functioning on D7 even in a dev version.
Views actually has an alpha version, lots of CCK is now part of D7 core and the rest in in beta, and pathauto is in beta. So if you're an experienced Drupal developer (enough to know which modules you need) and aren't launching for a while yet, I think you could start building in D7, but you would be increasing the hassle.
I was looking to update a fairly minor site to D7 just to see how it would go, but there were enough missing items (themes/modules), that I decided it still wasn't time.